代码
#include<stdio.h>
#include<string.h>
using namespace std;
int main()
{
int n,a,b;
while(~scanf("%d%d%d",&n,&a,&b))
{
printf("%d\n",(n+1)*a+(n+1)*b);
}
}
#include<stdio.h>
#include<string.h>
using namespace std;
int main()
{
int n,a,b;
while(~scanf("%d%d%d",&n,&a,&b))
{
printf("%d\n",(n+1)*a+(n+1)*b);
}
}
